Is this with the unit set to 'AUTO'
Surely if the dial up temp is say 17 deg C, and it is only 10 deg C ambient temp, then it will blow warm air until the cabin reaches 17 deg C. It should then mix the hot/cold air and maintain the 'set' temperature. Normally in the summer a setting this low would provoke cold air, but in the winter it would be warm?
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